APR Porsche 911 Turbo S 3.8T (991.2) ECU Update (V1.1)

By: APR | 11/17/2021 < Back to Blog Home
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We’ve recently updated our Porsche 911 Turbo S 3.8T (991.2) Software suite to incorporate several new enhancements found on our other 991.2 ECU upgrades. This update improves on hardware compatibility, eliminating the need for separate Stage 1 and Stage 1+ files. Power and torque delivery has been updated and new safety features have been added to enhance reliability in all conditions! Additionally support for Ethanol (E60-E85) has been added. This free update from APR is available today. Call a dealer to schedule an appointment and visit our web page for more details.

  • Delivers up to 654 HP with 627 FT-LBS of torque (APR Plus)
  • Delivers up to 654-754 HP with 627-701 FT-LBS of torque (APR Stage 1)
  • Max gains of +92 AWHP with +93 AWFT-LBS of torque (APR Plus)
  • Max gains of +92-162 AWHP with +93-161 AWFT-LBS of torque (APR Stage 1)
  • Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades
  • Ethanol and race fuel support for maximum power on the race track
  • Optional factory term limit matching limited powertrain warranty with APR Plus
  • Multiple stages of performance offered
  • Switchable power levels through Porsche’s Normal, Sport, and Sport+ profiles
  • Linear throttle mapping
  • Standing RPM soft limiter increased
  • Left-foot braking / brake boosting added
  • Optimized thermal management with various engine safety protection routines added
  • Auto Start/Stop defaults to the off position
  • Enhanced power delivery and drivability through recalibrated exhaust flap actuation
  • Speed limiter removed
  • No hardware required (Software only)
  • Supports standard bolt on modifications
  • Free lifetime updates
  • Direct OBDII port flash (No ECU removal)
  • 30 day money back guarantee
APR Porsche 911 Turbo S 3.8T (991.2) ECU Upgrade
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